The final details of the rumoured $15m deal were reportedly being worked out before her co-conservators - father Jamie Spears and fiancé Jason Trawick - sign the contract, which will most likely occur over the weekend.

Spears will allegedly travel to New York as she believes personally appearing at the event will create a buzz for the show's second season.

Demi Lovato is rumoured to be the other female judge, after Nicole Scherzinger and Paula Abdul were axed from the panel.